Steam-trap.



PATBNTED JAN. 29, 1907. H. SANDVGSS.

SYEEAIYI TRAP,

- APPLIGATION FILED T13R21, 1906.

UNITED 'sTATEs PATENT. OFFICE.

HERMANN SVANDVOSS, OF nnuss, GERMANY} STEAM-TRAP.

Specification of Letters Patent. I

Patented Jan. 29, 190?.

Application filed February 21,1906. Serial No. 302.181.

' and similar devices.

In the accompanying drawings, Figure 1 is a longitudinal section of my improved steamtrap, showing the valve open; and Fig. 2, a detail of the lower part thereof, showing the valve closed.

The letter 0 indicates a tubular casing adapted to receive water of cond ensationat a and. discharge the same at 6. Within. the casii'ig is suspended. a cylinder (1 of smaller diameter than the inner diameter of the easing. Cylinder contains a piston 12, thedepending stem e of which projects through the perforated bottom of the cylinder. cylinder is filled above. piston (4 with mercury or other suitable liquid wt, which is of a na ture to readily expand under the influence of heat. enced outlet-valve f, adapted to close against the water-outlet. Froln valve f depends a rod 76, passing through an opening of easing c and adapted to actuate an alarm or indi- The The stem 6 acts u on as rin -influcat0r,'wl1i eh for the purposes of this inven- The in'- tion are equivalents of each other. dlcator isshown to consist of a pointer Z,

turning on fulcrum n and pivotally connected to lower end of red It, the pointer movin'g over scale 2).

To permit an easy play of the valve and prevent the outi low of liquid along rod k, the latter is surrounded within casing c'by a flexible hose secured to easing e at h and to the upper part of rod k at '5. During the normaLdischarge of the-condense-water valve f J is opened, sothat the water can escape through outlet 1). 'If steam enters the casing,

it expands liquid m to depress piston e, and

thereby close valve f and operate theindicater.

I claim- A steain-trap comprising a casing, an inclosed cylinder, a piston and a liquid within the cylinder, a valve controlled by the pis- 

